Keep track of accessibility focus across windows.

ui/accessibility/platform/ax_platform_node_win.cc

Index: ui/accessibility/platform/ax_platform_node_win.cc
diff --git a/ui/accessibility/platform/ax_platform_node_win.cc b/ui/accessibility/platform/ax_platform_node_win.cc
index ee7a4f9f8c6981ec7fe7c1d28eea79f781daa01f..6489266acb46c00af602d238ad98653b1a407d43 100644
--- a/ui/accessibility/platform/ax_platform_node_win.cc
+++ b/ui/accessibility/platform/ax_platform_node_win.cc
@@ -1007,6 +1007,15 @@ int AXPlatformNodeWin::MSAAState() {
   if (state & (1 << ui::AX_STATE_DISABLED))
     msaa_state |= STATE_SYSTEM_UNAVAILABLE;
 
+  gfx::NativeViewAccessible focus = delegate_->GetFocus();
+  if (focus == GetNativeViewAccessible())
+    data_.state |= (1 << ui::AX_STATE_FOCUSED);
+
+  // On Windows, the "focus" bit should be set on certain containers, like
+  // menu bars, when one of their children has focus.
+  if (GetData().role == ui::AX_ROLE_MENU_BAR && focus)
+    state->AddStateFlag(ui::AX_STATE_FOCUSED);
+
   return msaa_state;
 }